Cas 1257438-89-3,C19H25F3O4

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Check Digit Verification of cas no

The CAS Registry Mumber 1257438-89-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,4,3 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1257438-89:
(9*1)+(8*2)+(7*5)+(6*7)+(5*4)+(4*3)+(3*8)+(2*8)+(1*9)=183
183 % 10 = 3
So 1257438-89-3 is a valid CAS Registry Number.

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1257438-89-3Relevant academic research and scientific papers

Synthetic studies on the natural multidrug resistance modulator, irciniasulfonic acid B

Emura, Chisato,Higuchi, Ryuichi,Miyamoto, Tomofumi

, p. 1002 - 1003 (2010)

Synthetic studies on the natural multidrug resistance (MDR) modulator irciniasulfonic acid (ISA)-B utilizing cross metathesis and the Horner-Wadsworth-Emmons olefination is described. The key intermediate, 7-hydroxy-2-nonanone was optically resolved using a cyclopenta[b]furan derivative (ALBO-V).

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